Strainer.



UNITED 'STATES PATENT OFFICE.

' OMAR H. JEWELL, OF CHICAGO, ILLINOIS.

STRAINR.

SPECIFICATION forming part of Letters Patent No. 688,312, dated December 10, 1901.

Application iled April 16, 1900. Serial No. 13,096. (No model.)

To all whom it may concern:

Beit known that I, OMAR H. JEWELL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Strainers, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to straine rs for filters, and more particularly those designed for use in filters of large size, such as are commonly used for ltering water on alarge scale. They may, however, be used for such lother purposes as theyare adapted to.

One of the objects of my invention is to provide a strainer which Will be strong and ca-A pable of resisting the erosive action of the particles of the filter-bed for a long time.v

.A further object is to provide a strainer which Will present an extensive lateral surface for the admission and discharge of Water,

.as well as the usual more or less horizontal strainer-surface of earlier strainers.

Another Object is to provide for adjusting the strainer to suit dierentconditions.

I accomplish these Objects as illustrated in the drawings and as described in the specication.

What I regard as new will be set forth in the claims.

In the drawings, Figure 1 is a plan view. Fig. 2 is a vertical section on line 2 2 of Fig.

1. Fig. 3 is a horizontal section on line 3 3A of Fig. 2. Fig. 4 is a vertical section showing a modified arrangement of the strainer; and Fig. 5 is a horizontal section of the intermediate portion of the latter strainer, shown in Fig. 4.

Referring to the drawings, 6 indicates the base of the strainer, which is provided with a boss 7, Which is suitably screw-threaded to adapt it to be secured to the Water-pipe 8. As best shown in Fig. 2, the boss 7 is provided with a water-passage 9. The base 6 is provided on its upper surface with an annular ange 10, placed a short distance from its edge. The base-plate 6 also carries a supporting-frame 1l, which, as herein shown, consists of a tripod supported on and secured to said base-plate 6. Said frame 11 is provided with a hub 12 at its center, which is screw-threaded to receive a screw 13.

14 indicates a strainer-cylinder, the outer surfacefof which is concave, the inner surface being convex, as shown in Fig. 2. Said cylinder 14 is provided with a plurality of narrow slits 15 for the passage of water, said slits being so narrow as to prevent the passage of the filtering material. The lower edge of the cylinder 14 is adapted to rest on the base-plate 6 outside of the liange 10, as shown iu Fig. 2. The upper edge ofY said cylinder supports a strainer-cap 16, consisting of a circular plate/the upper surface of which is concave, its inner surface being convex, the center of the plate bein g depressed, so that the plate is somewhat M shapein crosssection,as shown in Fig. 2. The cap 16 is provided with a peripheral liange 17 and with a `central plate 18, adapted toglie over the hub 12, as shown in Fig. 2. The plate 18 is perforated for the passage of the shank of the screw 13, the head of said screw resting on said plate. When the strainer-cap is in position, the iiange 17 rests on the upper edge of the cylinderlfl, the screw 13 serving to bind the parts tightly together through the medium of the frame 1l. By this construction Iprovide a strainer in which an extensive lateral surface is provided for the passage of the liquid to be iiltered, as well as an extensive top surface, thus giving the strainer much greater .capacity than any prior construction known to me. This construction is advantageous also in that it provides for a more general lateral distribution of the wash-water when the filter is washed, thereby more effectually agitating the filter- 'bed, and `consequently increasing the efflciency of the lter.

Under certain circumstances it is desirable to vary the style ofA the strainer either to reduce the flow of the water or for other purposes, and by the construction above described I provide for such variation. For example, in Fig. 4 I have illustrated a strainer Inodied by the substitution of a perforated metal cylinder 19 for the cylinder 14, said'cylinder 19 being placed in position by simply removing the screw 18, after which thestrainercap 16 and the cylinder 14 are removed and the cylinder 19 placed upon the base 6, the cap and screw being then again placed in position. Various other forms of cylinders may be substituted where it is not deemed neces- ICO sary to secure the extensive lateral strainersurface provided by the cylinder 14.

That Which I claim as my invention, and desire to secure by Letters Patent, is-

l. A strainer for filters, consisting of a base, a strainer-cap, a removable intermediate section, and means securing the cap and base together to hold the intermediate section in position, substantially as described.

2. A strainer for iilters, consisting of a base, a frame secured thereto, a strainer-cap, a screw connecting said cap with said frame, and an intermediate frame between said cap and said base, said intermediate frame being clamped in position by said cap and base, substantially as described.

3. A strainer forlters, consisting of a base having a Water-passage therethrough, a cap,

and a cylindrical frame between said cap and base, said frame having its outer surface con- Vex and its inner surface concave and having a plurality of passages for the flow of the liquid, substantially as described.

4. A strainer for lters, consisting of a base having a water-passage therethrough, a strainer-cylinder resting thereon, said cylinL der having a convex outer surface and a con cave inner surface and a plurality of wateri passages, a strainer-cap resting on said cylinder, said cap being substantially M shape in cross-section, and means connecting said cap and base, substantially as described.

OMAR H. J EWELL.

Witnesses:

WILLIAM M. J EWELL, JOHN L. JACKSON. 

